Socket code

sock.c

@@ -0,0 +1,69 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <sys/socket.h>
+
+int main(void) {
+    // Get TCP protocol entry
+    struct protoent *pent = getprotobyname("tcp");
+    if (!pent) {
+        perror("getprotobyname failed");
+        return EXIT_FAILURE;
+    }
+
+    // Create socket
+    int server_fd = socket(AF_INET, SOCK_STREAM, pent->p_proto);
+    if (server_fd < 0) {
+        perror("socket failed");
+        return EXIT_FAILURE;
+    }
+
+    // Set up server address structure
+    struct sockaddr_in server_addr = {
+        .sin_family = AF_INET,
+        .sin_addr.s_addr = htonl(INADDR_ANY), // Bind to any available address
+        .sin_port = htons(8080) // Port 8080
+    };
+
+    // Bind socket
+    if (bind(server_fd, (struct sockaddr *)&server_addr, sizeof(server_addr)) < 0) {
+        perror("bind failed");
+        close(server_fd);
+        return EXIT_FAILURE;
+    }
+
+    // Listen for incoming connections
+    if (listen(server_fd, 5) < 0) {
+        perror("listen failed");
+        close(server_fd);
+        return EXIT_FAILURE;
+    }
+
+    printf("Server listening on port 8080...\n");
+
+    // Accept one client connection
+    struct sockaddr_in client_addr;
+    socklen_t client_len = sizeof(client_addr);
+    int client_fd = accept(server_fd, (struct sockaddr *)&client_addr, &client_len);
+    if (client_fd < 0) {
+        perror("accept failed");
+        close(server_fd);
+        return EXIT_FAILURE;
+    }
+
+    printf("Client connected!\n");
+
+    // Send a message to the client
+    const char *message = "Hello from server!\n";
+    send(client_fd, message, strlen(message), 0);
+
+    // Cleanup
+    close(client_fd);
+    close(server_fd);
+
+    printf("Exit\n");
+    return EXIT_SUCCESS;
+}